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Robert and Constance Dion were found strangled in the basement of their home in March after it was set on fire. U.S. marshals are offering a reward for tips that lead to the arrest of Matthew Dion, 38.

Matthew Dion is charged with two counts of second-degree murder in the deaths of his parents. He's also facing charges of arson and possession of child pornography.

A close family member was at the Dions' tarped and boarded-up home in Mooresville on Tuesday.

"I came here to clean," said the woman, who asked not to be identified. "I was having an emotional day. I decided to come and clean up. I know this has been an eyesore on Mooresville for six months, and I wanted to come here and clean up and make an effort to sift through some things."

The woman said she's glad officials may be closing in on Matthew Dion.

"It's been a nightmare, and it feels like it's still not real," she said. "Some days, it feels like it happened yesterday, and other days, it feels like it didn't happen six months ago."

She said she and other family members were relieved to hear that Matthew Dion was spotted in the St. Petersburg, Florida, area.

"We just want Matt caught," she said. "Matt needs to come home and answer to this. It's very important that he does and explain himself."

U.S. marshals said Matthew Dion stole a car in St. Petersburg on Sept. 5. The car was a late-model silver Hyundai Elantra with Florida license plate G673WH.

But investigators said he is known to change license plates and live out of his car to avoid detection. Investigators also released an updated sketch of how Matthew Dion might look now and would look with a clean-shaven face.

A $5,000 reward is being offered for information that leads to an arrest.

"I believe an innocent person doesn't run," the relative said.

Investigators are focused on the Atlanta, Georgia, and Florida areas, where Matthew Dion has an extensive history. They said no one should approach Matthew Dion and instead call police if they have any information about him.